Could Dr. Glacenoire’s occupation (his main 9 to 5 job, not his mad science pet projects) involve making a practical car that runs on liquid nitrogen? There are prototypes for such a car, and some of them have been built, but none are currently economically feasible (plus there are some safety issues with the storage of liquid nitrogen). I was reading about one model liquid nitrogen car that uses superconducting properties in its engine (this could tie into Dr. Glacenoire’s superconducting project). A car project could also tie into the mad scientist’s last name, glace noire (black ice in French), which is a term given to frozen precipitation that coats roads and bridges.

Note: Sorry for being so slow on posting the next comic strip; I’m not very fast at sketching, so I’m still working on it. I also have a tendency to change my mind a lot when it comes to planning out ideas and panels.